Answer:
Explanation:
let force exerted by engine be F.Net force =( F-400)N, applying newton law
F-400 = 1.5 x 10³x18 =27000 ,
F = 27400 N.
velocity after 12 s = 0 + 18 x 12 = 216 m/s
Average velocity = (0 + 216 )/2 = 108 m/s
Average power = force x average velocity = 27400 x 108 = 29.6 10⁵ W .⁶
b) At 12 s , velocity = 216 m/s
Instantaneous power = velocity x force = 216 x 27400 = 59.2 x 10⁶ W.
Answer:The wavelength of a 1-kHz sound traveling in water would be 150 cm.
Explanation:This is because in the equation, v(velocity) = 1500 m/s, and f (frequency) = 1 kHz.
Answer:4.93 m/s
Explanation:
Given
height to reach is (h )1.24 m
here Let initial velocity is u
using equation of motion
here Final Velocity v=0
a=acceleration due to gravity
u=4.93 m/s
Answer:
The car moved a distance .
Explanation:
First we need to know: <em>How much time will the tomato spend in the air?</em>
From Kinematics:
where and is gravity's acceleration.
When the tomato touches the car again,
Then, we have:
⇒
Also from Kinematics we have:
Which is very simple because we can take initial position 0 and there's no acceleration in the x direction. And
So, taking